Facebook graph api returns 400 bad request with correct access token

I just manually implemented a facebook oauth2 flow into my webapp. After receiving the correct access_token and trying to call the graph api for user data I got a 400 BAD REQUEST as response.

GET https://graph.facebook.com/me?accessToken=MY_CORRECT_TOKEN&fields=id,name,email

When I use exactly the same call within the dev tools provided on facebook it succeeds, but when I try using any other http client it doesnt work.
I already tried it with curl, apache commons and some other http clients.